Bump openssl-src to 300.3.5.4+3.5.4 (#16140)

### What does this PR try to resolve?

Switches to a version of openssl-src that works on
sparc64-unknown-linux-gnu. This makes it easier to build cargo for that
platform as you no longer need to build OpenSSL by hand first.

### How to test and review this PR?

On PopOS 22.04 x86-64:

```console
$ sudo apt install gcc-sparc64-linux-gnu
$ RUSTFLAGS="-Clinker=sparc64-linux-gnu-gcc" \
  CC_sparc64_unknown_linux_gnu=sparc64-linux-gnu-gcc \
  cargo build --target=sparc64-unknown-linux-gnu --features=vendored-openssl --release
$ scp ./target/sparc64-unknown-linux-gnu/release/cargo user@sparc-machine:
$ ssh user@sparc-machine uname -a
Linux sparc-machine 6.17.0-rc5+ #1 SMP Fri Sep 12 20:37:32 UTC 2025 sparc64 GNU/Linux
$ ssh user@sparc-machine ./cargo -V
cargo 1.92.0 (85a3813 2025-10-22)
```

Author: epage